{"product_id":"siemens-3ua5900-1a-solid-state-overload-relay","title":"Siemens 3UA5900-1A Solid State Overload Relay","description":"\u003cdiv\u003e\u003cp\u003eSiemens Furnas 3UA5900-1A Solid State Overload Relay is a motor-protection device designed to monitor current in a control circuit and trip on overload to safeguard connected equipment. The 3UA5900-1A variant is rated for 1–1.6 A of load current and includes a built-in ON\/OFF indicator for quick status checks, plus an auxiliary contact configuration of 1 normally open and 1 normally closed (1NO\/1NC) to support control signaling. This unit is part of the 3UA5900 family of solid-state overload relays and uses electronic current sensing with solid-state switching to provide protection without the mechanical wear associated with electromechanical relays. It is described by distributors as discontinued by the manufacturer, which means it is primarily encountered as surplus, aftermarket, or replacement stock rather than a current production item. In typical installations, the 3UA5900-1A is used in motor-control circuits alongside compatible Siemens contactors to detect overcurrent conditions and initiate protective action, helping prevent motor overheating and potential damage. Verify compatibility with your existing Siemens equipment before replacing a unit, since this model is no longer in active production.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268181872874,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-017.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/siemens-3ua5900-1a-solid-state-overload-relay","provider":"GTG Hardware","version":"1.0","type":"link"}